The blazer I am wearing is Lisa D (in a XS/S) and I wasnt able to tag here, but find it here: https://www.lisadicicco.com/products/oversized-blazer-1?utm_campaign=helena&utm_source=Instagram
It comes in 2 colors. I own both.
Denim runs TTS. One of my fav pairs! Boots are older Mango but including a similar option.